Routine test circuits for central-office senders



April 14, 1925.

F A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDERS led Sept. 23, 1922 25 Shee Mww/arzs; frank/07 4. 5/60/77 John 6. //4u//ffe RR m k RQ NNQ by My April 14,1925. 1,533,477

F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDERS 922 She'e April 14, 1925. 1,533,471

F. A. STEARN ET A]- RbUTINE TEST cmcims FOR CENTRAL OFFICE sznmms Filed Sept. 23 @1922 23 Sheds-SM 3 F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDERS April 14, 1925. 1,533,471

April 14. 1925. 1,533,417

F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SBNDERS 2a. 1922 25 sheets-sham 5 by v A/Ijl Apfil 1-4, 1925. 1,533,477

F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SEND BBS Filed Sept. 23, 1922 23 She'ets-Sheet 6 lonuewl //7veh/0r5:

0 n u c by Al April 14,1925; 1,533,477

F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDERS Filed Sept. 23, 1922 25 Sheds-Sheet /nven/ors.- F/ank/hvA Sfeam Jqhn CMWM/ff? by AH April 14, 1925. 1,533,477

- v F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDERS Filed SeptQZS, 9 2s sheets-sheets u I p a April 14, 1925.

F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDERS OQNUUWHN April 14,1925.

F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDERS April 14, 1925. 1,533,477

F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDERS //7ve/7/0r5: Frank/in ,4. 5/6447? John C. fif4u//ffe April 14, 1925.

F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDERS 2.5 Shea shy QQQ 1,533,417 F. A. STEARN ET AL ROUTINE TEST CIRCUITS. FOR CENTRAL OFFICE SENDERS April 14, 1925.

Filed Sept. 23

April 14, 1925. N F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDERS myenfors: Fra/M/m/I. 5/60/77 Job/7 CMZlu/xffe y A/fy Filed Sept. 23

Tan/em #01742.

April' 14, 1925. 1,533,477

F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAD OFFICE SENDERS Filed Sept. 23, 1922 23 Sheets-Sheet 18 Myer/farts.-

Frank/07A 5/60/77 John away/1m J by W Am April 14. 19.25,

v 1,533,477 F. A. STEARN ET AL,

' nou'rms TEST CIRCUITS FOR CENTRAL OFFICE smumns lnve/r I Frank/m4. Sfeqrn F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICESENDERS 4 mac.

' '/m/en/0r$: Fran/r)? A S/qarn Job/76. Mflul/ffe by W Affiz A ril-14, 1925. 1.5 3.471

F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDBRS Muen/ora: Fraflk/MA 5220/11 John CNZlu/lf/Zf F. A. STEARN ET AL ROUTINE TEST CIRCUITS FOR CENTRAL OFFICE SENDERS wnrnisii. @Ywfi 

